(C++) time (header file)

Header file containing time-related functions and structs.

time is not a C++ standard header file [1,2], but ctime is [2].

The example below shows how to test the speed of the STL's rand function:

include <iostream>

include <time>


int main()
{
  const clock_t begin = clock();
  for (int i=0; i!=10000000; ++i) std::rand();
  const clock_t end = clock();
  std::cout << "Time of STL rand(): " << difftime(end,begin) << std::endl;
}

Same example using the Boost C++ library

include <iostream>

include <boost/timer.hpp>


int main()
{
  boost::timer t;
  for (int i=0; i!=10000000; ++i) std::rand();
  std::cout << t.elapsed() << std::endl;
  return 0;
}

Topic links

References

1) C++ International Standard. ISO/IEC 14882. Second edition. Table 11.
2) C++ International Standard. ISO/IEC 14882. Second edition. Table 12.

last edited (November 18, 2006) by bilderbikkel, Number of views: 2840, Current Rev: 9 (Diff)

[Edit this page] [Page history] [What links here] [Discuss this topic] [Printer Friendly]